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Windows: Implement PIM caching, both for system encryption and for normal volumes. Add options to activate it in the Preferences and System Settings.

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This commit is contained in:
Mounir IDRASSI
2015-12-20 20:11:50 +01:00
parent 7832d712fd
commit 8f6c08330a
17 changed files with 140 additions and 58 deletions
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26
src/Common/Cache.c
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@@ -20,13 +20,14 @@
#include "Cache.h"
Password CachedPasswords[CACHE_SIZE];
int CachedPim[CACHE_SIZE];
int cacheEmpty = 1;
static int nPasswordIdx = 0;
int ReadVolumeHeaderWCache (BOOL bBoot, BOOL bCache, char *header, Password *password, int pkcs5_prf, int pim, BOOL truecryptMode, PCRYPTO_INFO *retInfo)
int ReadVolumeHeaderWCache (BOOL bBoot, BOOL bCache, BOOL bCachePim, char *header, Password *password, int pkcs5_prf, int pim, BOOL truecryptMode, PCRYPTO_INFO *retInfo)
{
int nReturnCode = ERR_PASSWORD_WRONG;
int i;
int i, effectivePim;
/* Attempt to recognize volume using mount password */
if (password->Length > 0)
@@ -47,11 +48,21 @@ int ReadVolumeHeaderWCache (BOOL bBoot, BOOL bCache, char *header, Password *pas
/* Store the password */
CachedPasswords[nPasswordIdx] = *password;
/* Store also PIM if requested, otherwise set to default */
if (bCachePim && (pim > 0))
CachedPim[nPasswordIdx] = pim;
else
CachedPim[nPasswordIdx] = 0;
/* Try another slot */
nPasswordIdx = (nPasswordIdx + 1) % CACHE_SIZE;
cacheEmpty = 0;
}
else if (bCachePim)
{
CachedPim[i] = pim > 0? pim : 0;
}
}
}
else if (!cacheEmpty)
@@ -61,7 +72,13 @@ int ReadVolumeHeaderWCache (BOOL bBoot, BOOL bCache, char *header, Password *pas
{
if (CachedPasswords[i].Length > 0)
{
nReturnCode = ReadVolumeHeader (bBoot, header, &CachedPasswords[i], pkcs5_prf, pim, truecryptMode, retInfo, NULL);
if (truecryptMode)
effectivePim = 0;
else if (pim == -1)
effectivePim = CachedPim[i];
else
effectivePim = pim;
nReturnCode = ReadVolumeHeader (bBoot, header, &CachedPasswords[i], pkcs5_prf, effectivePim, truecryptMode, retInfo, NULL);
if (nReturnCode != ERR_PASSWORD_WRONG)
break;
@@ -73,7 +90,7 @@ int ReadVolumeHeaderWCache (BOOL bBoot, BOOL bCache, char *header, Password *pas
}
void AddPasswordToCache (Password *password)
void AddPasswordToCache (Password *password, int pim)
{
int i;
for (i = 0; i < CACHE_SIZE; i++)
@@ -83,6 +100,7 @@ void AddPasswordToCache (Password *password)
}
CachedPasswords[nPasswordIdx] = *password;
CachedPim[nPasswordIdx] = pim > 0? pim : 0;
nPasswordIdx = (nPasswordIdx + 1) % CACHE_SIZE;
cacheEmpty = 0;
}